Let me tell more about what prompted the conversation with the platform manager. I was staying at a hotel in Amsterdam while doing an IT project in the north of the country. One of the days took the wrong train. At that time, I just attributed it to not really carefully reading the platform indicator. The next day had to take the same train, at the same time, carefully checked the platform monitor, but as I had been burned the previous day....Decided to also ask the train ticket controller at the train door. He laughed and pointed me to another different indicator some trains have, and that happened to show a different destination for that specific train.
The cognitive dissonance that I experienced was so strong, I decided right there to also be late that day, look for the train station manager, for a polite but frustrated conversation on my part, and it was then he clarified this.
Also any Internet search will show others with similar experiences.
Edit: Looking at this example from 6 months ago...Continues to happen:-)
https://community.ns.nl/dienstregeling-59/geen-sprinter-maar...